/Engine/Source/Editor/UnrealEd/Classes/Editor/EditorEngine.h
Converts passed in light actors into new actors of another type. Note: This replaces the old actor with the new actor. Most properties of the old actor that can be copied are copied to the new actor during this process. Properties that can be copied are ones found in a common superclass between the actor to convert and the new class. Common light component properties between the two classes are also copied
void ConvertLightActors ( [UClass](API\Runtime\CoreUObject\UObject\UClass) * ConvertToClass )